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Linear Combination of Atomic Orbitals Approximation in Nanocrystalline Yittria‐Stabilized Zirconia Synthesized by Citrate–Nitrate Gel Combustion Process
Author(s) -
Biswas Mridula,
Shashidhara Kannakaje,
Ojha Prasanta Kumar,
Chongdar Tapas Kumar,
Bandyopadhyay Nil Ratan
Publication year - 2008
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.02218.x
Subject(s) - nanocrystalline material , crystallite , yttria stabilized zirconia , materials science , cubic zirconia , atomic orbital , lattice constant , analytical chemistry (journal) , scherrer equation , chemistry , nanotechnology , metallurgy , ceramic , organic chemistry , electron , physics , quantum mechanics , diffraction , optics
Nanocrystalline yittria‐stabilized zirconia (YSZ) compounds with yittria concentration varying between 8 and 12 mol% have been synthesized by gel combustion method followed by heat treatment at 550°C. The YSZs are found to posses stable face centered cubic structure at room temperature by X‐ray diffractometry. The lattice parameter ‘ a ’ showed an increasing trend with increasing concentration of yittria. The crystallite size estimated by Scherrer method was in the range of 7–10 nm. Band gap studies showed an increasing trend with increasing yittria concentration and are found to be consistent with respective lattice parameters following the tight binding approximation or linear combination of atomic orbitals approximation.